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Hi Chris,
With the QHY12 you are getting a FOV of about 89x59 arcmin at an image scale of 1.16 arcsec/pixel. The 16200 would give you a bigger FOV of approx 102x81 arcmin at an image scale of 1.36 arcsec/pixel and would be about 3 times as fast to get to the same SNR. Sounds like a great option assuming the image circle of the scope/reducer is adequate for the bigger sensor.
I have used a couple of 16200 cameras and I like the sensor a lot.
I'm also a recent convert to the ASI1600/CMOS. I just bought one for a specific task: very fast imaging with camera lenses. On your scope the FOV would be approx 67x50 arcmin at an image scale of 0.86 arcsec/pixel. It would be faster than your QHY12 but less than half the speed of the 16200. If you wanted to target smaller targets, like galaxies, and were willing to spend more time on them then this would be a reasonable choice as well.
Cheers,
Rick.
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